Former Special Counsel Robert Mueller will reluctantly answer a subpoena and testify before the House Judiciary and Intelligence committees tomorrow. Ahead of the proceedings, which will air live on WBEZ, NPR national security editor Phil Ewing tells us what to listen for, and why it matters.

Plus, after 4 decades promoting music and music education in Chicago, Jim Hirsch is retiring. He talks about his days with the Old Town School of Folk Music, and the work he’s done for the last 15 years with the Chicago Sinfonietta